AS5145-HSST

AS5145-HSST Datasheet


AS5145/AS5145-I10/AS5145-I12

Part Datasheet
AS5145-HSST AS5145-HSST AS5145-HSST (pdf)
Related Parts Information
AS5145-HSSU AS5145-HSSU AS5145-HSSU
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AS5145/AS5145-I10/AS5145-I12
12-Bit Programmable Magnetic Rotary Encoder

Data Sheet
1 General Description

The AS5145 is a contact less magnetic rotary encoder for accurate angular measurement over a full turn of 360 degrees. It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing in a single device.

To measure the angle, only a simple two-pole magnet, rotating over the center of the chip, is required. The magnet may be placed above or below the IC.

An internal voltage regulator allows the AS5145 to operate at either 3.3V or 5V supplies.

Figure Arrangement of AS5145 and Magnet
2 Key Features

Contact less high resolution rotational position encoding over a full turn of 360 degrees

Two digital 12 bit absolute outputs - Serial interface - Pulse width modulated PWM output

Three incremental outputs

Quadrature A/B 10 or 12-bit and Index output signal pre-programmed versions available AS5145I10/AS5145-I12

User programmable zero position

Failure detection mode for magnet placement, monitoring, and loss of power supply

Red-Yellow-Green indicators display placement of magnet in Z-axis

Serial read-out of multiple interconnected AS5145 devices using Daisy Chain mode

Tolerant to magnet misalignment and gap variations

Wide temperature range - 40ºC to +150ºC

Fully automotive qualified to AEC-Q100, grade 0

Small Pb-free package SSOP 16 5.3mm x 6.2mm
3 Applications

Figure Block Diagram

VDD3V3

The device is ideal for industrial applications like contactless rotary position sensing and robotics automotive applications like steering wheel position sensing, transmission gearbox encoder, head light position control, torque sensing, valve position sensing and replacement of high end potentiometers.

VDD5V Mode_Index

LDO 3.3V

Hall Array

Front end

Amplifier

Ang Mag

PWM Interface

Absolute Interface

OTP Register

Incremental Interface

MagINCn MagDECn PWM

DO CSn CLK PDIO DTEST1_A

DTEST2_B
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AS5145

Data Sheet - Applications
3 - 37

AS5145

Data Sheet - Pin Assignments
4 Pin Assignments

Figure Pin Assignments Top View

MagINCn

MagDECn

DTest1_A

DTest1_B

Mode_Index

PDIO

AS5145

VDD5V

VDD3V3

Pin Description

The following SSOP16 shows the description of each pin of the standard SSOP16 package Shrink Small Outline Package, 16 leads, body size 5.3mm x 6.2mmm see Figure

Table Pin Description

Pin Number 1 2

Pin Name MagINCn MagDECn

Magnet Field Magnitude INCrease active low, indicates a distance reduction between the magnet and the device surface. see Table 9

Magnet Field Magnitude DECrease active low, indicates a distance increase between the device and the magnet. see Table 9

DTest1_A

Test output in default mode

DTest2_B

Test output in default mode

Must be left unconnected

Mode_Index

Select between slow open, low VSS and fast high mode. Internal pulldown resistor ~10kΩ .

Negative Supply Voltage GND

OTP Programming Input and Data Input for Daisy Chain mode. Internal

PDIO
pull-down resistor ~74kΩ .

Connect to VSS if not used

Data Output of

Synchronous Serial Interface

Clock Input of Synchronous Serial Interface Schmitt-Trigger input

Chip Select, active low Schmitt-Trigger input, internal pull-up resistor ~50kΩ

Pulse Width Modulation of approximately. 244Hz 1µs/step opt. 122Hz 2µs/step

Must be left unconnected

Must be left unconnected
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Deleted Min value for tDOvalid in Table 6 updated ordering information

Changed the Max value of tDOvalid in Table 6 to 413

Added “AS5145-I10/AS5145-I12” to the header Made some sentence corrections and spelling mistakes

Updated Incremental Mode on page 15 with new information.

Latest Datasheet
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AS5145
Data Sheet - Ordering Information
11 Ordering Information

The devices are available as the standard products shown in Table
Table Ordering Information

Model AS5145HSSU

Description 12-Bit Programmable Magnetic Rotary Encoder

Delivery Form

Tubes

AS5145HSST AS5145HSSU-I10 AS5145HSSU-I12
12-Bit Programmable Magnetic Rotary Encoder Pre-programmed 10 bit incremental Pre-programmed 12 bit incremental

Tape & Reel Tubes

Package

SSOP 16 5.3mm x 6.2mm SSOP 16 5.3mm x 6.2mm SSOP 16 5.3mm x 6.2mm SSOP 16 5.3mm x 6.2mm
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AS5145
Data Sheet - Ordering Information

Copyrights

Copyright 1997-2009, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
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Datasheet ID: AS5145-HSST 519751